Average of 10 numbers 2480. If average of 6 is 2475, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 2480. If average of 6 is 2475, average of remaining 4?

A. 2490

B. 2487.5

C. 2486

D. 2485

Answer: Option B

Solution (By JKExamLibrary)

Sum10=24800. Sum6=14850. Remaining=9950. Average=2487.5.

This question belongs to: Maths Average

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Question #1

The average of three numbers is 45. If two numbers are 40 and 50, the third number is:

A. 55

B. 40

C. 50

D. 45

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Correct Answer: Option D

Explanation:
Total of three numbers = 3×45 = 135. Third number = 135−40−50 = 45.

This question belongs to: Maths Average

Question #2

The average of 100 numbers is 50. The number 100 was misread as 10. Correct average?

A. 51

B. 50.9

C. 49

D. 50

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Correct Answer: Option B

Explanation:
Error -90. Increase 90/100=0.9. New=50.9.

This question belongs to: Maths Average

Question #3

Average of 9 numbers 1840. If average of 6 is 1835, average of remaining 3?

A. 1850

B. 1845

C. 1848

D. 1855

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Correct Answer: Option A

Explanation:
Sum9=16560. Sum6=11010. Remaining=5550. Average=1850.

This question belongs to: Maths Average

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